ACS Applied Polymer Materials, Год журнала: 2024, Номер unknown
Опубликована: Дек. 12, 2024
Terpolymerization of propylene oxide, CO2, and p-toluenesulfonyl isocyanate (TsNCO) was catalyzed by bifunctional AlIII porphyrin catalysts to afford polyurethane-poly(propylene carbonate), PU-PPC, with high CO2 contents up 39 wt %. TsNCO acted as a backbiting suppressor at the initial stage terpolymerization, contributing selective formation PU-PPC. In contrast electrophilicity TsNCO, carbamate anion generated reaction alkoxide intermediate has modest nucleophilicity owing tosyl group, which allows for smooth PU units subsequent elongation PPC on catalyst selectively produce Terpolymers having in 1:1 ratio had glass transition temperature (Tg) 86–104 °C, while those higher Tg values 39–40 °C. Block copolymer PU-b-PPC, synthesized one-pot two-step manner, showed two 45 76 Pure 10% weight loss (Td10) 230 PU-PPC Td10 236–254 They were degradable upon UV light irradiation heat treatment, they resistant acid. The terpolymerization strategy using potentially enables one create CO2-based polymers such plastics elastomers degradability controlled or heat.
Язык: Английский